Orbit I-585 speed limit in South Carolina
55 mphUsual limit
Mostly 55 mph: about 100% of I-585 in South Carolina is posted at 55.
How much of I-585 is at each limit
Questions
What is the speed limit on I-585 in South Carolina?
Mostly 55 mph: about 100% of I-585 in South Carolina is posted at 55.
What is the highest speed limit on I-585 in South Carolina?
55 mph, on 100% of its length in South Carolina.
Can the limit be lower than this?
Yes. Work zones, bad weather and local signs can set a lower limit. The posted sign is always the limit.
How does Orbit know the limit?
Orbit uses state and federal road data and OpenStreetMap, and drivers confirm limits from the road. In the app, the limit for the road you are on shows on the map and in CarPlay.
Posted limits as of October 2026, from state and federal road data and © OpenStreetMap contributors, measured by length of road. Work zones, weather and signs can set a lower limit; always follow the posted sign.
Other Interstates in South Carolina
Orbit shows the limit for the road you're on · coming soon to iPhone and CarPlaySee Orbit SI